Arizen Bio Labs

Arizen Bio Labs is a US-based research-peptide supplier whose strongest signal is its lab work: public, batch-linked Janoshik COAs on exactly the compounds buyers most need verified. We pulled and confirmed two genuine certificates from real samples — Retatrutide at 99.909% (lot JRT120225) and BPC-157 at 99.5% (lot J0-2601-004), each recent and with dual-vial quantification. Janoshik is a gold-standard, independently-verifiable lab, so where Arizen publishes a COA the evidence is about as good as it gets.

The limiting factor is breadth, not quality. Only around 10 of 35 products carry a published certificate — the two GLP codenames and BPC-157 do, but Semaglutide, TB-500, Ipamorelin, CJC-1295, Cagrilintide and SS-31 don't (the FAQ is candid that coverage isn't universal), and all of it comes from a single lab. Reputation is the other drag: the Trustpilot profile is real but young and low-volume (4.6/21, claimed April 2026), and the on-site review counts are inflated relative to that. Add a Wyoming registered-agent address, no named ownership, and codenamed GLPs, and the score lands mid-tier despite the genuinely strong COAs. Card + Zelle checkout, US overnight shipping, 10%-off reader code PEPTIDEP10.